我有一個有一些圖表的 gui 應用程式。我用我的圖表作為子圖。當我開始顯示圖表時，圖表線不會出現，但軸仍在繼續。我不知道是什么問題。我還撰寫了一個簡單的代碼，它有 2 個子圖，它們作業正常，但這個不作業。這是代碼。它可以是可執行的。當您按下Start Listing Datas界面圖中的按鈕時，將啟動。我希望代碼是可以理解的。我剪掉了一些不必要的部分。
from tkinter import *
from tkinter import ttk
import time
import matplotlib.pyplot as plt
import matplotlib.animation as animation
from matplotlib.figure import Figure
from matplotlib.backends.backend_tkagg import (FigureCanvasTkAgg)
import random
root = Tk()
root.title("ktu")
root.state('zoomed')
root.configure(bg="#0059aa")
plt.style.use('ggplot')
#------------------------------------------------------------------------------------------------------------------------------------
#datas !!!!!!!!!!!!!!!!!!!!
global datas
datas = []
global packageNum
packageNum = 0
def randomData():
# randData.clear()
randData = []
randData.append(356356)
global packageNum
packageNum = packageNum 1
randData.append(packageNum)
randData.append( time.strftime("%H") ":"
time.strftime("%M") ":"
time.strftime("%S") ", "
time.strftime("%d") "/"
time.strftime("%m") "/"
time.strftime("%Y"))
randData.append(random.randint(0,10000)) # data for yindex 3
randData.append(random.randint(0,10000)) # data for yindex 4
randData.append(random.randint(0,700)) # data for yindex 5
randData.append(random.randint(0,700)) # data for yindex 6
randData.append(randData[6]-randData[5])
randData.append(random.randint(10,20)) # data for yindex 8
randData.append(random.randint(20,25)) # data for yindex 9
randData.append(random.randint(39,50)) # data for yindex 10
randData.append(random.randint(1,6)) # data for yindex 11
randData.append(0.0000)
randData.append(0.0000)
randData.append(random.randint(0,700))
randData.append(0.0000)
randData.append(0.0000)
randData.append(random.randint(0,700))
randData.append("durum")
randData.append(random.randint(0,100))
randData.append(random.randint(0,100))
randData.append(random.randint(0,100))
randData.append(random.randint(0,50))
randData.append("hay?r")
randData.append(" ")
return randData
#------------------------------------------------------------------------------------------------------------------------------------
#seri port
seriPortOuter = LabelFrame(root,text=u"SERIAL PORT",border=3, width=170,height=210)
seriPortOuter.place(x=5,y=305)
text1= Label(seriPortOuter,text=u"get connection", width=14,
font=("Helvetica",10),
fg="white", bg="red")
text1.place(x=3,y=5)
text2= Label(seriPortOuter,text="COM Port", width=8,
font=("Helvetica",10))
text2.place(x=1,y=30)
portList = ["Option1", "Option2", "Option3",
"Option4", "Option5", "Option6"]
portCombo = ttk.Combobox(seriPortOuter, values = portList, width=8)
portCombo.set("")
portCombo.place(x=68,y=30)
text3= Label(seriPortOuter,text=u"Speed", width=4,
font=("Helvetica",10))
text3.place(x=1,y=55)
speedList = ["Option1", "Option2", "Option3",
"Option4", "Option5", "Option6"]
speedCombo = ttk.Combobox(seriPortOuter, values = speedList, width=8)
speedCombo.set("")
speedCombo.place(x=68,y=55)
global x
x=0
def StartListing():
root.after(2000,StartListing)
global x
global datas
datas = randomData()
GraphIt(plot1, x, 3, plot1Canvas,fig_plot1, 0, 0)
GraphIt(plot2, x, 4, plot2Canvas,fig_plot2, 1, 0)
GraphIt(plot3, x, 5, plot3Canvas,fig_plot3, 0, 1)
GraphIt(plot4, x, 6, plot4Canvas,fig_plot4, 1, 1)
GraphIt(plot5, x, 10, plot5Canvas,fig_plot5, 0, 2)
GraphIt(plot6, x, 9, plot6Canvas,fig_plot6, 1, 2)
GraphIt(plot7, x, 11, plot7Canvas,fig_plot7, 0, 3)
GraphIt(plot8, x, 8, plot8Canvas,fig_plot8, 1, 3)
x= x 1
StartListingButton = Button(seriPortOuter, text=u"Start Listing Datas", command=StartListing, width=19)
StartListingButton.place(x=10,y=125)
#graph
graph_canvas = Canvas(root, width=842,height=575, bg="#0059aa" )
graph_canvas.place(x=585,y=30) #607~
# graph_canvas.config(highlightbackground="white")
#Pressure 1
fig_plot1= Figure(figsize=(2.33,2.5), dpi=100)
plot1= fig_plot1.add_subplot(111)
plot1.set_title(u'Pressure1 (Pa)',fontsize=8)
plot1Canvas = FigureCanvasTkAgg(fig_plot1, master=graph_canvas)
plot1Canvas.get_tk_widget().grid(row=0,column=0,pady=5, padx=3)
plot1Canvas.draw()
#bas?n? 2
fig_plot2= Figure(figsize=(2.33,2.5), dpi=100)
plot2= fig_plot2.add_subplot(111)
plot2.set_title(u'Pressure2 (Pa)',fontsize=8)
plot2Canvas = FigureCanvasTkAgg(fig_plot2, master=graph_canvas)
plot2Canvas.get_tk_widget().grid(row=1,column=0,pady=5, padx=3)
plot2Canvas.draw()
#yükseklik 1
fig_plot3= Figure(figsize=(2.33,2.5), dpi=100)
plot3= fig_plot3.add_subplot(111)
plot3.set_title(u'altitude1 (m)',fontsize=8)
plot3Canvas = FigureCanvasTkAgg(fig_plot3, master=graph_canvas)
plot3Canvas.get_tk_widget().grid(row=0,column=1,pady=5, padx=2)
plot3Canvas.draw()
#yükseklik 2
fig_plot4= Figure(figsize=(2.33,2.5), dpi=100)
plot4= fig_plot4.add_subplot(111)
plot4.set_title(u'altitude2 (m)',fontsize=8)
plot4Canvas = FigureCanvasTkAgg(fig_plot4, master=graph_canvas)
plot4Canvas.get_tk_widget().grid(row=1,column=1,pady=5, padx=2)
plot4Canvas.draw()
#nem ?zgün g?rev
fig_plot5= Figure(figsize=(2.33,2.5), dpi=100)
plot5= fig_plot5.add_subplot(111)
plot5.set_title('temperature (°C)',fontsize=8)
plot5Canvas = FigureCanvasTkAgg(fig_plot5, master=graph_canvas)
plot5Canvas.get_tk_widget().grid(row=0,column=2,pady=5, padx=2)
plot5Canvas.draw()
#s?cakl?k
fig_plot6= Figure(figsize=(2.33,2.5), dpi=100)
plot6= fig_plot6.add_subplot(111)
plot6.set_title(u'temperature (°C)',fontsize=8)
plot6Canvas = FigureCanvasTkAgg(fig_plot6, master=graph_canvas)
plot6Canvas.get_tk_widget().grid(row=1,column=2,pady=5, padx=2)
plot6Canvas.draw()
#pil
fig_plot7= Figure(figsize=(2.33,2.5), dpi=100)
plot7= fig_plot7.add_subplot(111)
plot7.set_title('voltage (V)',fontsize=8)
plot7Canvas = FigureCanvasTkAgg(fig_plot7, master=graph_canvas)
plot7Canvas.get_tk_widget().grid(row=0,column=3,pady=5, padx=2)
plot7Canvas.draw()
#h?z
fig_plot8= Figure(figsize=(2.33,2.5), dpi=100)
plot8= fig_plot8.add_subplot(111)
plot8.set_title(u'descent velocity (m/sn)',fontsize=8)
plot8Canvas = FigureCanvasTkAgg(fig_plot8, master=graph_canvas)
plot8Canvas.get_tk_widget().grid(row=1,column=3,pady=5, padx=2)
plot8Canvas.draw()
def GraphIt(myplot,xindex, yindex, canvas, fig, rw, col):
myplot.plot(xindex, datas[yindex])
canvas = FigureCanvasTkAgg(fig,master=graph_canvas)
canvas.draw()
canvas.get_tk_widget().grid(row=rw,column=col,pady=5, padx=2)
plt.show()
root.mainloop()
uj5u.com熱心網友回復：
plot默認要畫線，一條線至少需要 2 個 xy 對。僅繪制一個點，plot接受第三個引數，例如 'ro' 來表示一個紅點。
每個圖形都已經canvas創建好了，不需要FigureCanvasTkAgg再次呼叫獲取新的畫布。
def GraphIt(myplot, xindex, yindex, canvas, fig, rw, col):
myplot.plot(xindex, datas[yindex], 'ro')
# canvas = FigureCanvasTkAgg(fig,master=graph_canvas)
canvas.draw()
# canvas.get_tk_widget().grid(row=rw, column=col, pady=5, padx=2)
# plt.show()
要繪制線段，需要更多點作為引數，以下代碼保留舊資料并發送兩個點作為引數，然后您會發現線段已繪制。
global x, old_datas
x, old_datas = 0, None
def StartListing():
root.after(2000,StartListing)
global x
global datas, old_datas
datas = randomData()
GraphIt(plot1, x, 3, plot1Canvas, fig_plot1, 0, 0)
GraphIt(plot2, x, 4, plot2Canvas, fig_plot2, 1, 0)
GraphIt(plot3, x, 5, plot3Canvas, fig_plot3, 0, 1)
GraphIt(plot4, x, 6, plot4Canvas, fig_plot4, 1, 1)
GraphIt(plot5, x, 10, plot5Canvas, fig_plot5, 0, 2)
GraphIt(plot6, x, 9, plot6Canvas, fig_plot6, 1, 2)
GraphIt(plot7, x, 11, plot7Canvas, fig_plot7, 0, 3)
GraphIt(plot8, x, 8, plot8Canvas, fig_plot8, 1, 3)
x= x 1
old_datas = datas
def GraphIt(myplot, xindex, yindex, canvas, fig, rw, col):
x1, y1 = xindex, datas[yindex]
if old_datas:
x0, y0 = x1-1, old_datas[yindex]
myplot.plot([x0, x1], [y0, y1], 'r-')
canvas.draw()
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